diff --git a/upup/models/cloudup/resources/addons/coredns.addons.k8s.io/k8s-1.12.yaml.template b/upup/models/cloudup/resources/addons/coredns.addons.k8s.io/k8s-1.12.yaml.template
index ccfe6ee910..f18fbe7b81 100644
--- a/upup/models/cloudup/resources/addons/coredns.addons.k8s.io/k8s-1.12.yaml.template
+++ b/upup/models/cloudup/resources/addons/coredns.addons.k8s.io/k8s-1.12.yaml.template
@@ -348,8 +348,12 @@ spec:
           - --v=2
       priorityClassName: system-cluster-critical
       tolerations:
-      - key: "CriticalAddonsOnly"
-        operator: "Exists"
+        {{- if KubeDNS.Tolerations }}
+{{ ToYAML .KubeDNS.Tolerations | indent 8 }}
+        {{- else }}
+        - key: "CriticalAddonsOnly"
+          operator: "Exists"
+        {{- end }}
       serviceAccountName: coredns-autoscaler
       nodeSelector:
         kubernetes.io/os: linux